The firearm I've had the longest is a Browning B-80.
One of Browning's best, IMO.
I got one with the steel receiver when they just hit the shelves, the magnum receiver. I have a 26" 2 3/4" barrel, 28" 3" barrel, and a 20" 3" cyl shotgun barrel with sights. It's killed a lot of upland game, waterfowl, and two deer. It will be part of my estate.